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Eridanus is a constellation which stretches along the southern celestial hemisphere. It is represented as a river . One of the 48 constellations listed by the 2nd century AD astronomer Ptolemy , it remains one of the 88 modern constellations .
This image is a derivative work of the following images: File:Eridanus_constellation_map.png licensed with Cc-by-sa-3.0-migrated, GFDL 2004-12-12T18:11:16Z Alfio 2559x3119 (212030 Bytes) Eridanus constellation map; Uploaded with derivativeFX
40 Eridani is a triple star system in the constellation of Eridanus, abbreviated 40 Eri. It has the Bayer designation Omicron 2 Eridani, which is Latinized from ο 2 Eridani and abbreviated Omicron 2 Eri or ο 2 Eri. Based on parallax measurements taken by the Gaia mission, it is about 16.3 light-years from the Sun.
Theta Eridani, Latinized from θ Eridani, is a binary system in the constellation of Eridanus with a combined apparent magnitude of 2.88. [6] Its two components are designated θ 1 Eridani, formally named Acamar / ˈ æ k ə m ɑːr / (the traditional name of the system), [13] [14] and θ 2 Eridani.
Epsilon Eridani is located in the northern part of the constellation Eridanus, about 3° east of the slightly brighter star Delta Eridani. With a declination of −9.46°, Epsilon Eridani can be viewed from much of Earth's surface, at suitable times of year. Only to the north of latitude 80° N is it permanently hidden below the horizon. [78]
Achernar is the brightest star in the constellation of Eridanus and the ninth-brightest in the night sky. It has the Bayer designation Alpha Eridani, which is Latinized from α Eridani and abbreviated Alpha Eri or α Eri. The name Achernar applies to the primary component [14] of a binary system. [5]
The system is located in the constellation Eridanus, about 33 light-years (10 parsecs) away from the Sun. It was discovered in images taken by the Wide-field Infrared Survey Explorer (WISE) and formally published by Gregory N. Mace and collaborators in March 2013.
NGC 1376 is a spiral galaxy located around 180 million light-years away in the constellation Eridanus. [1] It was discovered in 1785 by William Herschel , and it is 79,000 light-years across. [ 1 ] NGC 1376 is not known to have an active galactic nuclei , but it does have lots of star-forming regions .